Bar graph display panel and system for displaying analog values

Details Bar graph display panel and system for displaying analog values Bar graph display panel and system for displaying analog values

1979-03-15

1981-08-25

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

313217, 313494, 3151694, 340713, 340753, 340773, G01D 700, H01J 1748

Patent

active

042862655

ABSTRACT:
The display panel comprises a gas-filled envelope which contains a series of aligned cathode electrodes, an anode for the series, and a reset cathode at each end of the series of cathodes. The system includes a driving circuit which repeatedly scans along the series of aligned cathode electrodes by sequentially grounding the aligned electrodes and repeating the process cyclically. Within each cycle, a pulse width modulator energizes the anode, which is opposite the cathode electrodes, for a period of time corresponding to an input value. Sequential glow discharges thus occur between the cathodes and the anode over a portion of the anode length. The discharges occur with sufficient rapidity so that they are observed as an illuminated portion of a bar formed by the electrodes. The panel is particularly suited for producing two illuminated bands or bars separated from each other. Desired upper and lower set point limits for the input quantity determine the lengths of the bands and the separation between them. The separate bands are initiated from opposite ends of the series of cathode electrodes by first energizing the reset cathodes. The driver forms one band from one end of the aligned electrodes and the other band from the other end of the aligned electrodes.

REFERENCES:
patent: Re30095 (1979-09-01), Miller
patent: Re30172 (1979-12-01), Saxon
patent: 2925530 (1960-02-01), Engelbart
patent: 3775764 (1973-11-01), Gaur
patent: 3875474 (1975-04-01), Ogle et al.
patent: 3961217 (1976-06-01), Frischer
patent: 3973166 (1976-08-01), Maloney
patent: 4163971 (1979-08-01), Morin et al.

Affiliated with

Also associated with

Rating

Bar graph display panel and system for displaying analog values does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bar graph display panel and system for displaying analog values , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bar graph display panel and system for displaying analog values will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1161492